Patents Examined by Hoa V. Le
  • Toner
    Patent number: 9829814
    Abstract: A toner having a toner particle that contains a binder resin, a pigment, a pigment dispersant, and a crystalline polyester, wherein the pigment dispersant has a specific pigment adsorption segment and a polymer moiety and a hydrophobic parameter HP1 for the pigment dispersant and a hydrophobic parameter HP2 for the crystalline polyester satisfy the formula ?0.28?(HP1?HP2)?0.15.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: November 28, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yu Yoshida, Yuhei Terui, Haruko Kubo, Masashi Kawamura, Yasuaki Murai, Takayuki Toyoda
  • Electrostatic image developing toner and two-component electrostatic image developer
    Patent number: 9823596
    Abstract: Provided is an electrostatic image developing toner including a toner mother particle containing a colorant and a binder resin comprising a crystalline resin and an amorphous resin; and an external additive. The external additive includes an inorganic fine particle having a number average major axis in a range of 50 to 100 nm, an average aspect ratio in a range of 3 to 10, and a volume resistivity in a range of 1×1010 to 1×1012 ?·cm in primary particles.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: November 21, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Futoshi Kadonome, Satoshi Uchino, Shinya Obara, Noriyuki Kimpara, Ikuko Sakurada, Takuya Takahashi
  • Coated photoconductive substrate
    Patent number: 9823591
    Abstract: The present disclosure is drawn to apparatuses and methods that include a coated photoconductive substrate. The coated photoconductive substrate can include a photo-conductive substrate with a charge generation layer and a charge transport layer, and can also have a coating adhered to the photoconductive substrate. The coating can comprise a polymer and can be devoid of charge transport materials.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: November 21, 2017
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Sivapackia Ganapathiappan, Krzysztof Nauka, Hou T. Ng
  • Toner
    Patent number: 9817327
    Abstract: A toner comprises a binder resin, a colorant, and a compound represented by the following general formula [1]: (in the formula, R1 to R8 each independently represent a group selected from the hydrogen atom, fluorine atom, bromine atom, iodine atom, hydroxy group, acetyl group, aldehyde group, C1 to C6 hydrocarbon groups, and amino group; X represents a group selected from the oxygen atom, sulfur atom, carbonyl group, and —CR9R10—; and R9 and R10 each independently represent a group selected from the hydrogen atom, bromine atom, C1 to C3 hydroxyalkyl groups, hydroxy group, phenyl group, and C1 to C6 hydrocarbon groups).
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: November 14, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Toru Takahashi, Daisuke Tsujimoto, Yoshihiro Ogawa, Hiroki Watanabe, Wakashi Iida
  • Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus and process for producing electrophotographic photosensitive member
    Patent number: 9811012
    Abstract: The present invention provides an electrophotographic photosensitive member in which an undercoat layer contains a metal oxide particle, a particular benzophenone compound and a particular ketone compound, a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member and a process for producing the electrophotographic photosensitive member.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: November 7, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Mai Murakami, Ryoichi Tokimitsu, Wataru Kitamura
  • Toner
    Patent number: 9811016
    Abstract: A toner comprising a toner particle comprising a binder resin that comprises a crystalline resin, wherein the toner satisfies the following formulas (1) and (2) in DSC measurement of the toner, 50.0?Tt?80.0??formula (1) 0.00??HT?t-3/?H?0.20??formula (2) where Tt [° C.] is the peak temperature of the endothermic peak P1, ?H [J/g] is the endothermic quantity from a temperature lower than T?t by 20.0° C. to a temperature higher than T?t by 10.0° C. when T?t [° C.] is the peak temperature of the endothermic peak P 2, and ?H T?t-3 [J/g] is the endothermic quantity from a temperature lower than T?t by 20.0° C. to a temperature lower than T?t by 3.0° C.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: November 7, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kenji Aoki, Tetsuya Kinumatsu, Yusuke Kosaki, Shuntaro Watanabe, Noritaka Toyoizumi, Takaaki Kaya, Atsushi Tani, Takashige Kasuya
  • Liquid developer
    Patent number: 9804520
    Abstract: A liquid developer containing toner particles containing a resin and a basic dispersant in an insulating liquid, wherein the resin contains a polyester A having a furan ring. The liquid developer of the present invention is suitably used in development and the like of latent images formed in an electrophotographic method, an electrostatic recording method, an electrostatic printing method, or the like.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: October 31, 2017
    Assignee: Kao Corporation
    Inventors: Tatsuya Yamada, Nobumichi Kamiyoshi
  • Method for producing carrier for developing electrostatic latent image and method for producing two-component developer
    Patent number: 9798264
    Abstract: Provided is a method for producing a carrier for developing an electrostatic latent image, the carrier including carrier particles each including a core particle with a surface coated with a coating material including a resin, and the method including the steps of: a) obtaining first coating resin particles by polymerizing an alicyclic methacrylate monomer using, as a polymerization initiator, an azo compound having a nitrogen atom-containing substituent; b) obtaining second coating resin particles by polymerizing an alicyclic methacrylate monomer using a persulfate as a polymerization initiator; and c) forming carrier particles by coating surfaces of core particles with a coating material obtained by mixing at least the first and second coating resin particles.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: October 24, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kosuke Nakamura, Satoshi Uchino, Koji Shibata
  • Method of producing toner
    Patent number: 9798262
    Abstract: Provided is a method of producing a toner including the steps of: mixing a resin solution comprising a resin R, a colorant, and an organic solvent, a resin fine particle comprising a resin S containing an element ?, and carbon dioxide to form a droplet having a surface covered with the resin fine particle; introducing carbon dioxide in a liquid state and pressurizing to extract the organic solvent in the droplet; and removing the extracted organic solvent together with the carbon dioxide to provide a toner particle. In the method of producing a toner, when the resin fine particle is treated with the carbon dioxide in a liquid state, a change in amount of the element ? on the surface of the resin fine particle after the treatment as compared to the amount before the treatment falls within a specific range.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: October 24, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Noritaka Toyoizumi, Yusuke Kosaki, Tetsuya Kinumatsu, Kenji Aoki, Shuntaro Watanabe, Takaaki Kaya, Atsushi Tani, Kazumichi Nakahama, Shinnosuke Koji, Takashige Kasuya
  • Low fixing temperature sustainable toner
    Patent number: 9791795
    Abstract: The disclosure relates to a resin made with no more than 6 mol % of a rosin or a rosin derivative combined with a lower molecular weight crystalline polyester resin in a toner with low fixing temperature and higher blocking temperature.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: October 17, 2017
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Guerino G. Sacripante
  • Electrophotographic photoreceptor, electrophotographic cartridge, image forming apparatus, and charge transport substance
    Patent number: 9791791
    Abstract: The present invention relates to an electrophotographic photoreceptor comprising a conductive support and a photosensitive layer disposed thereover, wherein the photosensitive layer comprises a compound represented by general formula (1) and palladium, the photosensitive layer having a palladium content of 0.01-50 ppm.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: October 17, 2017
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Tadashi Mizushima, Mitsuo Wada, Yuka Nagao
  • Magnetic carrier, two-component developer, replenishment developer, and image formation method
    Patent number: 9785070
    Abstract: A magnetic carrier comprising: a magnetic material-dispersed resin carrier core material; and a resin coating layer on the surface of the magnetic material-dispersed resin carrier core material, wherein the magnetic material-dispersed resin carrier core material contains a core material particle containing a magnetic material and a binder resin, and a primer compound having an amino group, the resin coating layer contains a coating resin A, which is a polymer of monomers including at least a (meth)acrylic acid ester having an alicyclic hydrocarbon group, and the content of the primer compound in the magnetic material-dispersed resin carrier core material and the content of the resin coating layer are in specific range.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: October 10, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Nobuyoshi Sugahara, Hironori Minagawa, Wakashi Iida, Atsushi Nakano
  • Electrostatic ink compositions
    Patent number: 9785078
    Abstract: This disclosure relates to an electrostatic ink composition comprising: a liquid carrier, and particles dispersed in the liquid carrier, wherein the particles comprise a resin and a substantially spherical silver pigment; wherein the substantially spherical silver pigment constitutes at least 30 wt % of the solids of the electrostatic ink composition. Print substrates are also disclosed herein.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: October 10, 2017
    Assignee: Hewlett-Packard Indigo B.V.
    Inventors: Yaron Grinwald, Yana Reznick, Reut Avigdor, Gregory Katz
  • Toner set for electrostatic image development, developer set for electrostatic image development, process cartridge set, image forming apparatus, and image forming method
    Patent number: 9785076
    Abstract: A toner set for electrostatic image development includes a cyan toner, a magenta toner, and a yellow toner, wherein the Vicat softening temperatures of the toners are respectively in the range of from about 30° C. to about 60° C., and among the toners, the difference between the Vicat softening temperature of the toner having the highest Vicat softening temperature and the Vicat softening temperature of the toner having the lowest Vicat softening temperature is from about 1° C. to about 5° C.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: October 10, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Hiroko Kobayashi
  • Toner
    Patent number: 9785077
    Abstract: The present invention provides a toner having a toner particle that contains a binder resin and an organic silicon polymer, wherein the organic silicon polymer has a specific structure, the proportion of the specific structure to the number of a silicon atom in the organic silicon polymer contained in the toner particle is at least 5.0%, the toner particle contain a polyester resin of from at least 1.0% by mass to less than 80% by mass, and the polyester resin is a specific polymer.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: October 10, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koji Abe, Yuhei Terui, Katsuyuki Nonaka, Tsuneyoshi Tominaga
  • Toner and imaging method
    Patent number: 9778583
    Abstract: A toner having compatibility between transfer properties and cleaning properties is provided. A toner wherein a fine particle A containing a primary particle having a number average particle diameter (D1) of 80 nm or more and 400 nm or less is present on the surface of a toner particle at a coverage ratio of 5 to 40%, a fixing rate of 30 to 90% by mass, and a variation coefficient of 0.1 to 0.5 in a region of 0.5 ??m2.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: October 3, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazuo Terauchi, Yojiro Hotta, Takeshi Naka, Motohide Shiozawa, Shohei Tsuda, Masami Fujimoto
  • Polymer including phthalocyanine structure, method for producing the polymer, pigment composition, pigment dispersion, and toner
    Patent number: 9777087
    Abstract: A polymer including a unit having a phthalocyanine structure, the polymer having a high capability of dispersing pigments. A pigment composition, a pigment dispersion, and a toner all having a high tinting strength.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: October 3, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuaki Murai, Osamu Matsushita, Takayuki Toyoda, Waka Hasegawa, Ayano Mashida, Kosuke Mukumoto, Masashi Hirose
  • Liquid developer and developer cartridge
    Patent number: 9766565
    Abstract: A liquid developer includes a carrier liquid and a toner including a urethane-modified acrylic resin.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: September 19, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masahiro Oki, Koji Horiba, Takako Kobayashi, Akira Imai, Yoshitake Ogura, Hiroyuki Moriya, Daisuke Yoshino
  • Electrostatic charge image developing toner and manufacturing method of the same
    Patent number: 9766564
    Abstract: Provided is a means that can improve performance such as high-speed fixability and fixable temperature range while securing low temperature fixability, in an electrostatic charge image developing toner concurrently using a crystalline resin and an amorphous resin as binder resins constituting toner base particles. An electrostatic charge image developing toner containing toner base particles containing an amorphous resin and a crystalline resin is constituted such that lamellar crystal structures and fibrous crystal structures are dispersed in the cross section of the toner base particles.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: September 19, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Natsuko Fujisaki, Tomomi Oshiba, Makoto Nomiya
  • Toner and method for producing the same
    Patent number: 9766566
    Abstract: A toner includes a toner particle including a surface layer containing an organosilicon polymer. The toner particle contains a styrene acrylic resin and a block polymer that has i) a polyester segment C and a vinyl polymer segment A, the mass ratio C/A of the polyester segment C to the vinyl polymer segment A being 40/60 to 80/20, and ii) a melting point Tm of 55° C. to 90° C. The organosilicon polymer has a partial structure represented by Rf—SiO3/2.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: September 19, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinsuke Mochizuki, Kenichi Nakayama, Koji Abe, Toshihiko Katakura, Masatake Tanaka, Naoya Isono